Photographs – Photo rumblings and whispers

Hemispherical time-lapse under a tree

Pedro J. Aphalo 2020-09-29 2020-09-29Landscape, Plants, Techniques 0

In two earlier posts titled “Lens adapter with filter drawer” and “Lens adapters: flange-to-flange distance” I discussed how crucial it is to achieve the exact effective flange-to-flange distance when dealing with adapted objectives with a very short focal distance. I also described how I shimmed an adapter to achieve this. Recently I had an opportunity to use the Sigma 4.5mm 1:2.8 circular fisheye objective in Nikon AF mount adapted to my Olympus E-M1 Mk II camera to create a time-lapse video. I captured 500 images, with a pause of 1 s between them. Total time was a bit over 10…

A time lapse video assembled in ImageJ

Pedro J. Aphalo 2019-08-21 2019-08-21Landscape, Photography, Techniques 0

Steps used to create video Use time-lapse setting in camera to take a series of 300 photographs, one every 10 seconds. Set auto-exposure lock. Set camera on a tripod. Import the 300 images into Capture One (version 12.1). Edit the first image including correction for perspective and cropping. Select the 300 images, copy the edits from the first photograph to the remaining 299. Export the 300 photographs JPEG, setting long edge maximum length at 1600 pix. Read the 300 images into ImageJ (version 1.52p) using “File > Import > Image sequence”. Export the video from ImageJ using “File > Save…

Measuring campaign in the Alps

Pedro J. Aphalo 2019-06-19 2020-12-19Lichens, Photographs, Plants, UV-induced fluorescence 0

I joined a field measuring campaign organized by my collaborator T. Matthew Robson with the participation of José Ignacio García Plazaola and Beatriz Fernández-Marín from the University of the Basque-Country (see Matt’s CanSEE and my SenPEP blogs for information on our research). We spent the last week of May the at 2100 m a.s.l. in the Alps at the Jardin Botanique du Lautaret measuring solar radiation and the responses of plants to it. I did some measurements of solar radiation but spent most of the time photographing plants and lichens to record their optical properties in the ultraviolet-A, visible and…

Photographs of flowers: VIS vs. UV-A

Pedro J. Aphalo 2018-09-09 2018-10-15Photographs, Photography, Plants 0

Visible vs. UV-A false-colour